diff --git a/src/device/i2c_bus.c b/src/device/i2c_bus.c
index 361bb67..1d4aa2d 100644
--- a/src/device/i2c_bus.c
+++ b/src/device/i2c_bus.c
@@ -11,6 +11,8 @@
 bool i2c_dev_detect(struct device *dev, unsigned int addr)
 {
 	struct i2c_msg seg = { .flags = 0, .slave = addr, .buf = NULL, .len = 0 };
+	if (!dev)
+		return false;
 	return dev->ops->ops_i2c_bus->transfer(dev, &seg, 1) == 0;
 }